Is CVE-2009-2820 in the CISA KEV catalog?

No. CVE-2009-2820 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-2820?

CVE-2009-2820 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2009-2820?

CVE-2009-2820 has an EPSS score of 5.78% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-2820?

Upgrade cups on debian 11 to 1.4.2-1 or later.

CVE & CISA-KEV Catalog

CVE-2009-2820

MEDIUMEPSS 92th pctl

4.3

CVSS v2

NVD

Description

The web interface in CUPS before 1.4.2, as used on Apple Mac OS X before 10.6.2 and other platforms, does not properly handle (1) HTTP headers and (2) HTML templates, which allows remote attackers to conduct cross-site scripting (XSS) attacks and HTTP response splitting attacks via vectors related to (a) the product's web interface, (b) the configuration of the print system, and (c) the titles of printed jobs, as demonstrated by an XSS attack that uses the kerberos parameter to the admin program, and leverages attribute injection and HTTP Parameter Pollution (HPP) issues.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

cupsDebian

Fixed in:1.4.2-1CVE-2009-2820

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

5.78%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Patch2

Vendor Advisory1

lists.apple.com

Other references12

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.